Problem

class compas_fea2.problem.Problem[source]

Bases: FEAData

A Problem is a collection of analysis steps (:class:`compas_fea2.problem._Step) applied in a specific sequence.

Parameters:

namestr, optional: Uniqe identifier. If not provided it is automatically generated. Set a name if you want a more human-readable input file.
describptionstr, optional: Brief description of the Problem, , by default None. This will be added to the input file and can be useful for future reference.

Attributes:

namestr: Uniqe identifier. If not provided it is automatically generated. Set a name if you want a more human-readable input file.
modelcompas_fea2.model.Model: Return the model associated with the problem.
describptionstr: Brief description of the Problem. This will be added to the input file and can be useful for future reference.
stepslist of compas_fea2.problem._Step: List of analysis steps in the order they are applied.
pathstr, pathlib.Path: Path to the analysis folder where all the files will be saved.
path_dbstr, pathlib.Path: Path to the SQLite database where the results are stored.
resultscompas_fea2.results.Results: Results object with the analyisis results.

Warning

Factore Steps are new objects! check the :class:`compas_fea2.problem._Step documentation.

Notes

Problems are registered to a compas_fea2.model.Model.

Problems can also be used as canonical load combinations, where each load is actually a factored step. For example, a typical load combination such as 1.35*DL+1.50LL can be applied to the model by creating the Steps DL and LL, factoring them (see :class:`compas_fea2.problem.Step documentation) and adding them to Problme

While for linear models the sequence of the steps is irrelevant, it is not the case for non-linear models.

Methods

`add_linear_static_perturbation_step`	Add a linear perturbation step to a previously defined step.
`add_static_step`	Adds a `compas_fea2.problem._Step` to the problem.
`add_step`	Adds a `compas_fea2.problem._Step` to the problem.
`add_steps`	Adds multiple `compas_fea2.problem._Step` objects to the problem.
`analyse`	Analyse the problem in the selected backend.
`analyse_and_extract`	Analyse the problem in the selected backend and extract the results from the native database system to SQLite.
`analyze`	American spelling of the analyse method
`extract_results`	Extract the results from the native database system to SQLite.
`find_step_by_name`	Find if there is a step with the given name in the problem.
`is_step_in_problem`	Check if a `compas_fea2.problem._Step` is defined in the Problem.
`restart_analysis`	Continue a previous analysis from a given increement with additional steps.
`summary`	Prints a summary of the Problem object.
`write_input_file`	Writes the input file.

Inherited Methods

`ToString`	Converts the instance to a string.
`copy`	Make an independent copy of the data object.
`from_json`	Construct an object of this type from a JSON file.
`from_jsonstring`	Construct an object of this type from a JSON string.
`sha256`	Compute a hash of the data for comparison during version control using the sha256 algorithm.
`to_json`	Convert an object to its native data representation and save it to a JSON file.
`to_jsonstring`	Convert an object to its native data representation and save it to a JSON string.
`validate_data`	Validate the data against the object's data schema.